Double-current syringe



J'. K. MITCHELL. DOUBLE CURRENT SYRLNGE. M PLlcATloN FILED APR. 9,1920.

1,384,771 Patented July 19, 1921.

aafla;

ATTORNEYS UNITED STATES PATENT OFFICE.

DOUBLE-CURRENT SYRINGE.

Specification of Letters Patent.

Patented July 19, 1921.

Application filed April 9, 1920. Serial No. 372,482.

To all whom it may concern:

Be it known that I, JOSEPH KINNEY MITCHELL, a citizen of the United States, and a resident of Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Double-Current Syringes, of which the following is a specification.

My invention is an improvement in double current syringes, and has for its object to provide a device of the character specified by means of which thorough irrigation may be had, with thorough drainage, an wherein, with the syringe in place in. the cavity, the irrigating solution may be permitted to waste, or may be directed into the cavity through the spray head.

In the drawings:

Figure 1 is a vertical section of the improved syringe;

Fig. 2 is an end view of the spray head- Fig. 3 is a section on the line 3-3 o Fig. 1.

In the present embodiment of the invention a tubular casing 1 is provided, of suitable material, as, for instance, hard rubber, and this tube is externally threaded at one end to receive a spray cap 2.

The spray cap has an internal annular flange or rib 3, which abuts the end of the tubular body 1, to limit the turning movement of the cap on to the body, and the rounded portion of the cap is provided with perforations as shown for permitting the escape of the irrigating solution from the body 1.

This tubular casing or body 1 has near the end remote from the cap a lateral opening into which is threaded one end of a branch pipe 4. This branch pipe has a reduced nipple 5 at the end remote from the casing 1 with which a soft rubber tube 6 may be connected, to connect the tubular body 1 of the syringe with a suitable source of supply for irrigating fluid, as, for instance, the discharge faucet of a bath tub.

A jacket 7 is supported by the branch pipe 4. This jacket, which is of an internal diameter such that there will be an annular space between the casing 1 and the jacket, has a lateral openin through which is threaded the branch pipe 4;, and the upper end of this jacket extends to near thejcap, which is spaced apart from the said cap, as

clearly shown in Fig. 1. The jacket eX- tends beyond the branch pipe slightly, but not to the opposite end of the tubular casing from the spray cap. This jacket provides an annular drainage chamber between the jacket and the tubular casing 1.

In operation, the syringe is inserted into the cavity to be irrigated, the hose 6 being connected to a suitable source of supply, and the syringe is held as shown in Fig. 1, the fingers of the hand grasping the lateral branch which forms a handle, and with the d the thumb the lower end of the tubular body may be controlled, the thumb being removed to permit the solution to waste, and being closed to constrain the solution to How into the cavity to be irrigated.

By means of the thumb the water may be regulated to the proper temperature. When the proper temperature is reached the thumb is placed over the open end of the tubular casing and the water must now flow by way of the tubular body out through the openings of the spray cap. The waste water passes between the jacket and the tubular casing and escapes from the cavity, whose walls are held dilated by the jacket.

I claim:

1. A device o1l the character specified comprising a tubular casing having one end open and having the other provided with a detachable spray head, said casing having a lateral branch near the open end for connection withv the source of liquid supply, the open end of the casing being adapted to be closed by the thumb to provide either irrigation or drainage, and a jacket supported by the lateral branch and inclosing the tubular casing in spaced relation to provide a discharge passage about the tubular casing, said jacket being spaced apart from the spray cap at its inner end.

2. A device of the character specified comprising a tubular casing having one end open and having the other provided with a detachable spray head, said casing having a lateral branch near the open end 'for connection with the source of liquid supply, the' open end of the casing being adapted to be closed by the thumb to provide either irrigation or drainage, and a jacket supported by the lateral branch and inclosing the tubular casing in spaced relation to provide a discharge passage about the tubular casing.

to provide either irrigation or drainage, and

a jacket supported by the lateral branch and Y inclosing the tubular casing in spaced relal0 tion toprovide a discharge passage about the tubular casing.

JOSEPH KINNEY MITCHELL. 

